Set indicator aid for micrometers



I G. E. GLAUSER SET INDICATOR AIDS FOR MICROMETERS Oct. 24,1950

I Fiied Aug. 14, 1947 INVENTOR. Ciaader G QfaanE Patented Oct. 24, 1950r siir iNnioA'roaam FOR- MICROMETERS-I r I e raon'n. onuser, yri 'ohio vApplication-August 14, 1947 Serial No. 768,692

' is Cla'iinfs. (01.33916 Q-My present inventionrelates to the ge ie fil v class of geometrical instruments, or micrometers,

and more specifically to an improved set indi-' V cating aid formicrometers of the, type employing opposed contacts with screwadjustment, and

especially adapted for measuring short distances, lengths and angles.and for calipering'diameters of cylindrical bodies.

Theprimary object of ,the' invention is the provision of aguide devicefor setting the micrometer to: aid in enhancing, and increasing, theoperating speed ofpthe instrument for. precision measuring and,calipering. and the invention includes a mini mum number of componentparts that may. with facility be manufactured at low cost of producetion; andassembled'with convenience on a conventional micrometer of thistype, to insure an easily operated and precise measuring instru- Theinventon consists in certain novel features of construction andcombinations, and arrange; ments of parts"as"wi11 hereinafter bedescribed} and more particularly set forth in the appended.

claims. -.-'In" the accompanying drawings I have illustrated a completeexample of aphysical embodiment of my invention wherein the parts arecombined'an'd arranged in accord with one model have devised for thepractical application of the principles of my inventionf Itwill,however.- be understood that changes and alterations are contemplatedand may be made in these exemplifying drawings and mechanicalstructures, within the scope of my claims without departing from theprinciples of the invention.

Figure 1 is an assembly view showing a'con-' ventional micrometerequipped with the high and low setting rings of my invention; and Figure2 is an enlarged view of a portion of the instrument disclosing thebarrel of the instrument having an annular groove or channel toaccommodate the setting rings.

Figures 3 and 4 are respectively an edge view and a face view of one ofthe setting rings or indicator rings;

Figures 5 and 6 are respectively an edge view and a face view of anotherindicator or setting ring; and I Figures 7 and 8 show an edge view and aface view respectively of the intermediate resilient orelasticfrictional coupling ring or expander.

In order that the general arrangement and utility of parts may readilybe understood I have shown in the assembly view Fig. 1 a conventionalrelj with its annular graduated scale, and tapered scaleZ, togetherwiththe linear graduated scale on the stationary thimble 3, which are,capable of being alined with the marker or line: as indicatedin.Fig.-;1. i

V The stationary bearing-yoke 4 is provided with a fixed contact head 5,and the screw bar. 6 journaled in the-bearing 1 of the yoke terminatesin the-movable or adjustable contact point 8; the knurled barrel I beingemployed for adjust: ing the screw bar in customary manner. f

best'seen in Fig. 2 in carrying out my in--;

vention the barrel I is fashioned with an exterior; groove or channelwhich forms two spaced;- .cirf.=

cular. shoulders or walls In and II that are adapted to receive andretain a pair of rotatablesplit resilient rings, orhigh and lowindicators.

which q are. resiliently and frictionally coupled together to permit ajointly rotary movementwithin the channel and between its walls, and

also to permit relative movement of thertwo rings within the-.channeL-asan aid in setting the instrument. v r The forwarder front indicator ringl2, which.

has an exterior diameter slightly greater than the outerdiameter of thebarrel, is equipped with a short lateral pointer 13 flush with itsexterior periphery, that projects longitudinally of the barrel for=co-action with the taperedscale-Lf This indicator ring of elastic orresilient ma:-

terial is split at M so that it may readily be fashioned with a planefront face for frictional contact with the wall In of the channel. Therear, or coupling face l5 of the ring is serrated, or provided withradial teeth for co-action with an intermediate coupling ring orexpander [6, which is fashioned of resilient material and split at M formounting on the grooved barrel.

The body of the coupling ring is fluted. as at I! to provide double, ordual, serrated faces, that co-act with a second, similar, indicatorring, as well as the ring 12.

,The second ring [8 of resilient material is also split for readilyslipping into place, and it is the first ring to be seated in thechannel, after which the coupling ring I6 and the front ring ii aresuccessively seated.

The ring [8 is mounted in the channel with its plane face in frictionalcontact with the wall I I, and this ring, which is equipped with alonger longitudinally extending, outset or offset pointer l9,is'provided with a serrated face 20 for comicrometer including therotary cylindrical baraction with the resilient expander or couplingring it. As indicated in Fig. 1 the pointers l3 and I9, although ofvarying lengths, terminate jointly for magnification with thegraduations of the scales, and the ofiset or outset relation of pointerIS with respect to pointer l 3 permits relative movements of thepointers without interference.

The resilientintermediate expander or coupling ring in frictionalengagement atits opposite sides with the two in'dic'atori" rings exertssiifilient pressure'orforce to create the required friction forretaining the three rings in operative relation. By grasping the threerings between a" thumb and finger they may be jointly revolved as orrotated, and with equal facility a selected one of the indicator ringsmay manually b'etiifnd with relation to the other ringandthe b arrel;- ij in calipering operations in connection with the adjustment of the twocontact heads by nie ans of the operating screw.

Having thus fully described'my itiVefition ,-'What ric-ia-im as new anddesire to secure by Letters; Patent'is: v I a l, Ina micrometer of theopposedcontacts and screw operated type, the combination with ringsinou'nte'd the channe -mt ictiohal engagement with the walls, pointersrigid with said rings, respeo'tivel fi and -eiiteiiding l'ateral-ly fromthe same toward the scale and 'a 'split'elastic cou ling ring-betweenand" f "ict'i'onally en agin said iridicatr rings: 1

aid fr' Setting a an dineter'inclilding' at liaif'el hayinga graduatedscale afidexterior laterally spaced annular wans, a plurality of in?013051561 rings each having a pointer extending to:

were the scale; said ringsfritionally engagingasezese barrel.

said walls, and an intermediate elastic coupling ring frictionallyengaging adjoining faces of the indicator rings.

4. In a micrometer of the opposed contacts and screw operated type, thecombination with a barrel having exterior annular walls spaced laterallythereon and a graduated scale, of a plurality of indicator rings eachmounted in frictional contactcwith a wall respectively, a pointer oneach :of "aid rings extending toward the scale, said rings havingserrations on adjoining faces, and an intermediate coupling ring havingopposed srrated faces in frictional engagement with the serrations: ofthe indicator rings.

, 5.. ,In a micrometer of the opposed contacts and screw-operated type,the combination with a barrel hayingexterior annular walls spacedlaterally thereon and a graduated scale, of a plurality of splitresilient indicator rings mounted in frictional contact with said walls,respectively, a pointer rigid witl'l' each ring and extending towara thescale,- s'aidfifig's' haying Se'frati0hs"on adjoining faces, and anintermediate split re snient cou ling ring having opposed serratedfacesin" frictional contact With theserrations of the 111- dicator rings; I6.- In a micrometer of the opposed contacts and screw operated type, thecombination with a barreLhaving exterior annular walls laterally spacedthereon and a graduated scale, of a plurality ot indicator ringsfrictionallyengaging said walls; respectively, and resilient meansbetween adjoin ingifaces'of said rings whereby said rings may: berotatedJointly orrelative to each other onsaid GORDON E. CLAUSER.

. REFERENCE-s CITED,

'lhe following references are of record in the file orties;patent-5 l VH fieurreojsrmss ensure Number Date Name 2,107,222 Summers Feb. 1, 193825 4337 Drucker annals; Aug. 15, 1944 PATENTS i hlurnber Country Date139,295 Great Britain es: July 31-, 1919',

1 135,051, Great Britain :2 NOV; 20, 191-9,

